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22.4 litres of at 27.3°C and 1 atmosphere pressure shall weigh
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7.Which of the following sets of conditions represent the easiest way to liquefy a gas?
A. Low temperature and high pressure
B. High temperature and low pressure
C. High temperature and low pressure
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4
The vapour density of ozone would be
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4
All gases tend to show ideal behaviour
A. at low temperature and low pressure
B. at high temperature and high pressure
C. at high temperature and low pressure
D. at low temperature and high pressure
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4
In the gas equation PV = xT, x is a constant. The value of the constant depends upon
C. type values of T and P
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4
Four 1 litre flasks are separately filled with hydrogen, helium, oxygen and ozone gases at the same temperature and pressure. The ratio of total number of atoms of these gases present in the different flasks would be
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At what temperature, the root mean square velocity of oxygen molecules is equal to that of at 27°C?
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Volume occupied by 1 gm equivalent of oxygen at NTP is
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Equal weights of methane and hydrogen are mixed in an empty container at 25°C. The fraction of the total pressure exerted by methane is
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The vapour density of completely dissociated sociated would be
A. Determined by the amount of solid used in the experiment
B. Triple to that of
D. Slightly less than half of that of
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In a unit cell of cesium chloride the arrangement of cesium ions is
B. hexagonal close packed
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A balloon filled with ethane is pricked up with sharp point and quickly plunged into a tank of hydrogen at the same pressure. After some time balloon will
C. remain unchanged in size
D. have half its volume of the gas
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Lattice energy of a solid is high if
A. the radii of the ions are large
B. radii of the ions are small
C. charge on the ions are small
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Which of the following contains the same number of atoms as 12 gms: of Magnesium (Atomic weights : Mg = 24, C = 12, Ca = 40)
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The vapour density of gas A is four times that of gas B. If the molecular weight of gas B is M, then the molecular weight of gas A is
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The number of molecules in 4.25 gm of ammonia are approximately
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How many moles of water are present in 180 gm. of water ?
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According to Avogadro's hypothesis equal volumes of two gases under the same conditions of temperature and pressure contain
A. Equal number of electrons
D. Equal number of molecules
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The pressure of the ideal gas is less than the real gas because of the
A. increase in the number of collisions
B. volume occupied by the molecules
C. inter-molecular attraction
D. finite size of molecules
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Volume occupied by 4.4 gift of carbon dioxide is
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Gases deviate from the ideal behaviour because their molecules
A. possess negligible volume
B. have forces of attraction between them
D. are not attracted to one another
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For a given gas at temperature T and pressure P the root mean square velocity (RMS) is C; then at temperature T and pressure 3P the RMS is
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The coordination number of each sphere in hcp arrangement is
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In a closed packed structure the pattern ABAB...... represents which one of the following:
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The kinetic theory of gases predicts that total kinetic energy of a gaseous assembly depends upon the
B. temperature of the gas
D. pressure, temperature and volume of the gas
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22.4 litre of any gas at N.T.P. will contain
B. One gram atomic weight
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The number of molecules in 32 gms of oxygen in
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The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure:
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Avogadro stated that under similar conditions of temperature and pressure equal volumes of all gases contain equal number of
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The weight of 11.2 litres of at S.T.P. would be